GB332549A - Improvements in and relating to means for pressing talking machine records - Google Patents

Improvements in and relating to means for pressing talking machine records

Info

Publication number
GB332549A
GB332549A GB12268/29A GB1226829A GB332549A GB 332549 A GB332549 A GB 332549A GB 12268/29 A GB12268/29 A GB 12268/29A GB 1226829 A GB1226829 A GB 1226829A GB 332549 A GB332549 A GB 332549A
Authority
GB
United Kingdom
Prior art keywords
die
slots
pressing
recesses
talking machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB12268/29A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Parlophone Records Ltd
Original Assignee
Gramophone Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gramophone Co Ltd filed Critical Gramophone Co Ltd
Priority to GB12268/29A priority Critical patent/GB332549A/en
Priority to US441130A priority patent/US1915357A/en
Publication of GB332549A publication Critical patent/GB332549A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/30—Mounting, exchanging or centering
    • B29C33/305—Mounting of moulds or mould support plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2017/00—Carriers for sound or information
    • B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
    • B29L2017/003—Records or discs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/81—Sound record

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Extrusion Of Metal (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

332,549. Gramophone Co., Ltd., and Fernberg, E. B. April 19, 1929. Moulding phonograph records; pressing-dies.- Talking machine records are positively removed from their moulds after the pressing operation by providing slots or recesses 8 in the die retaining rings 7 at two or more opposite points, into which slots the excess from the record material flows to form lifting pieces. The slots or recesses may be formed in pieces secured to the die-retaining rings. When such pieces project above the level of a die-retaining ring, the opposite die-retaining ring is grooved to accommodate this projection. The slots or recesses may be continuous or there may be several spaced at intervals.
GB12268/29A 1929-04-19 1929-04-19 Improvements in and relating to means for pressing talking machine records Expired GB332549A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB12268/29A GB332549A (en) 1929-04-19 1929-04-19 Improvements in and relating to means for pressing talking machine records
US441130A US1915357A (en) 1929-04-19 1930-04-02 Means and method for pressing talking machine records

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12268/29A GB332549A (en) 1929-04-19 1929-04-19 Improvements in and relating to means for pressing talking machine records

Publications (1)

Publication Number Publication Date
GB332549A true GB332549A (en) 1930-07-21

Family

ID=10001423

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12268/29A Expired GB332549A (en) 1929-04-19 1929-04-19 Improvements in and relating to means for pressing talking machine records

Country Status (2)

Country Link
US (1) US1915357A (en)
GB (1) GB332549A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211815A (en) * 1962-03-05 1965-10-12 Purex Corp Ltd Molded bottle ejection apparatus and method
DE1504959B2 (en) * 1964-03-16 1972-03-16 RECORD PRESS
US4374636A (en) * 1979-04-18 1983-02-22 Discovision Associates Apparatus for producing centrally apertured record discs
EP0247244B1 (en) * 1986-02-26 1992-01-15 Kabushiki Kaisha Meiki Seisakusho Improved molding apparatus and method for producing centrally-apertured discs
US4795127A (en) * 1986-09-27 1989-01-03 Kabushikik Kaisha Meiki Seisakusho Mold assembly of injection-molding machine
US5171585A (en) * 1988-04-16 1992-12-15 Daicel Chemical Industries, Ltd. Apparatus for molding a formatted substrate for an optical disk

Also Published As

Publication number Publication date
US1915357A (en) 1933-06-27

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